名校
1 .
是公差不为零的等差数列,前
项和为
,若
,
,
,
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c9f6087624e855404b24750c763cbb.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca2cc2768794136c1e4da47d2f0873e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e76d1d8e50dda4d50229a8a20c57e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c9f6087624e855404b24750c763cbb.png)
您最近一年使用:0次
2023-05-05更新
|
711次组卷
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2卷引用:黑龙江省大庆市大庆中学2023届高三三模数学试题
2 . 已知数列
为等差数列,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbbc08bca7e93773f195446620aa0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c32e71e1803603989c788bd1e9bb95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbbc08bca7e93773f195446620aa0e5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-06-07更新
|
4667次组卷
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7卷引用:【全国百强校】黑龙江省哈尔滨三中2018届高三三模考试数学(文科)试题